package com.fgkj.report;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFClientAnchor;
import org.apache.poi.hssf.usermodel.HSSFComment;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFPatriarch;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.formula.functions.T;
import org.apache.struts2.ServletActionContext;


public class FileUtil {	
	private static String filename="用户表.xls";
	
	
	public static InputStream ReaderFile(){
		InputStream is=null;		
		is=ServletActionContext.getServletContext().getResourceAsStream("/files/"+filename);
		//System.out.println(is);
		return is;
	}
	
	/*public static void WriterFile(List<User> list){
		HSSFWorkbook workbook = new HSSFWorkbook();
		HSSFSheet sheet = workbook.createSheet("sheet1"); 
		
		HSSFRow row=sheet.createRow(0);
		
		HSSFCell cell=row.createCell(0);
		cell.setCellValue("员工编号");
		cell=row.createCell(1);
		cell.setCellValue("员工姓名");
		cell=row.createCell(2);
		cell.setCellValue("性别");
		cell=row.createCell(3);
		cell.setCellValue("身份证号");
		cell=row.createCell(4);
		cell.setCellValue("座机号码");
		cell=row.createCell(5);
		cell.setCellValue("邮箱");
		cell=row.createCell(6);
		cell.setCellValue("家庭住址");
		cell=row.createCell(7);
		cell.setCellValue("手机号码");
		for(int i=0;i<list.size();i++){
			User user=list.get(i);
			row=sheet.createRow(i+1);
			
			cell=row.createCell(0);
			cell.setCellValue(user.getUid());
			
			cell=row.createCell(1);
			cell.setCellValue(user.getUname());
			
			cell=row.createCell(2);
			cell.setCellValue(user.getSex());
			
			cell=row.createCell(3);
			cell.setCellValue(user.getIdnumber());
			
			cell=row.createCell(4);
			cell.setCellValue(user.getPhone());
			
			cell=row.createCell(5);
			cell.setCellValue(user.getEmail());
			
			cell=row.createCell(6);
			cell.setCellValue(user.getAddress());
			
			cell=row.createCell(7);
			cell.setCellValue(user.getMobile());
		}
		try {
			String root=ServletActionContext.getServletContext().getRealPath("/files/"+filename);
			OutputStream os=new FileOutputStream(root);
			workbook.write(os);
			os.close();
			
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		
	}
	*/
	
	public void exportExcel(String title, String[] headers, Collection dataset, String fileName, String pattern, String type)  
            throws FileNotFoundException, IOException {    
        // 声明一个工作薄  
        HSSFWorkbook workbook = null;  
        if (type.equals("new")) {  
            workbook = new HSSFWorkbook();  
        } else if (type.equals("add")) {  
            InputStream myxls = new FileInputStream(fileName);  
            workbook = new HSSFWorkbook(myxls);  
            myxls.close();  
        }  
        // 生成一个表格  
  
        HSSFSheet sheet = workbook.createSheet(title);  
  
        // 设置表格默认列宽度为15个字节  
        sheet.setDefaultColumnWidth((short) 15);  
        // 生成一个样式  
        HSSFCellStyle style = workbook.createCellStyle();  
        // 设置这些样式  
        style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);  
        style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);  
        style.setBorderBottom(HSSFCellStyle.BORDER_THIN);  
        style.setBorderLeft(HSSFCellStyle.BORDER_THIN);  
        style.setBorderRight(HSSFCellStyle.BORDER_THIN);  
        style.setBorderTop(HSSFCellStyle.BORDER_THIN);  
        style.setAlignment(HSSFCellStyle.ALIGN_CENTER);  
        // 生成一个字体  
        HSSFFont font = workbook.createFont();  
        font.setColor(HSSFColor.VIOLET.index);  
        font.setFontHeightInPoints((short) 12);  
        font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);  
        // 把字体应用到当前的样式  
        style.setFont(font);  
        // 生成并设置另一个样式  
        HSSFCellStyle style2 = workbook.createCellStyle();  
        style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);  
        style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);  
        style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);  
        style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);  
        style2.setBorderRight(HSSFCellStyle.BORDER_THIN);  
        style2.setBorderTop(HSSFCellStyle.BORDER_THIN);  
        style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);  
        style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);  
        // 生成另一个字体  
        HSSFFont font2 = workbook.createFont();  
        font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);  
        // 把字体应用到当前的样式  
        style2.setFont(font2);  
  
        // 声明一个画图的顶级管理器  
        HSSFPatriarch patriarch = sheet.createDrawingPatriarch();  
        // 定义注释的大小和位置,详见文档  
        HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0, 0, 0, 0, (short) 4, 2, (short) 6, 5));  
        // 设置注释内容  
        comment.setString(new HSSFRichTextString("可以在POI中添加注释！"));  
        // 设置注释作者，当鼠标移动到单元格上是可以在状态栏中看到该内容.  
        comment.setAuthor("leno");  
  
        // 产生表格标题行  
        HSSFRow row = sheet.createRow(0);  
        for (short i = 0; i < headers.length; i++) {  
            HSSFCell cell = row.createCell(i);  
            cell.setCellStyle(style);  
            HSSFRichTextString text = new HSSFRichTextString(headers[i]);  
            cell.setCellValue(text);  
        }  
  
        // 遍历集合数据，产生数据行  
        Iterator it = dataset.iterator();  
        int index = 0;  
        while (it.hasNext()) {  
            index++;  
            row = sheet.createRow(index);  
            T t = (T) it.next();  
            // 利用反射，根据javabean属性的先后顺序，动态调用getXxx()方法得到属性值  
            Field[] fields = t.getClass().getDeclaredFields();  
            for (short i = 0; i < fields.length; i++) {  
                HSSFCell cell = row.createCell(i);  
                cell.setCellStyle(style2);  
                Field field = fields[i];  
                String fieldName = field.getName();  
                String getMethodName = "get" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1);  
                try {  
                    Class tCls = t.getClass();  
                    Method getMethod = tCls.getMethod(getMethodName, new Class[] {});  
                    Object value = getMethod.invoke(t, new Object[] {});  
                    // 判断值的类型后进行强制类型转换  
                    String textValue = null;  
                    // if (value instanceof Integer) {  
                    // int intValue = (Integer) value;  
                    // cell.setCellValue(intValue);  
                    // } else if (value instanceof Float) {  
                    // float fValue = (Float) value;  
                    // textValue = new HSSFRichTextString(  
                    // String.valueOf(fValue));  
                    // cell.setCellValue(textValue);  
                    // } else if (value instanceof Double) {  
                    // double dValue = (Double) value;  
                    // textValue = new HSSFRichTextString(  
                    // String.valueOf(dValue));  
                    // cell.setCellValue(textValue);  
                    // } else if (value instanceof Long) {  
                    // long longValue = (Long) value;  
                    // cell.setCellValue(longValue);  
                    // }  
                    if (value instanceof Boolean) {  
                        boolean bValue = (Boolean) value;  
                        textValue = "男";  
                        if (!bValue) {  
                            textValue = "女";  
                        }  
                    } else if (value instanceof Date) {  
                        Date date = (Date) value;  
                        SimpleDateFormat sdf = new SimpleDateFormat(pattern);  
                        textValue = sdf.format(date);  
                    } else if (value instanceof byte[]) {  
                        // 有图片时，设置行高为60px;  
                        row.setHeightInPoints(60);  
                        // 设置图片所在列宽度为80px,注意这里单位的一个换算  
                        sheet.setColumnWidth(i, (short) (35.7 * 80));  
                        // sheet.autoSizeColumn(i);  
                        byte[] bsValue = (byte[]) value;  
                        HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 1023, 255, (short) 6, index, (short) 6, index);  
                        anchor.setAnchorType(2);  
                        patriarch.createPicture(anchor, workbook.addPicture(bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG));  
                    } else {  
                        // 其它数据类型都当作字符串简单处理  
                        textValue = value.toString();  
                    }  
                    // 如果不是图片数据，就利用正则表达式判断textValue是否全部由数字组成  
                    if (textValue != null) {  
                        Pattern p = Pattern.compile("^//d+(//.//d+)?{1}");  
                        Matcher matcher = p.matcher(textValue);  
                        if (matcher.matches()) {  
                            // 是数字当作double处理  
                            cell.setCellValue(Double.parseDouble(textValue));  
                        } else {  
                            HSSFRichTextString richString = new HSSFRichTextString(textValue);  
                            HSSFFont font3 = workbook.createFont();  
                            font3.setColor(HSSFColor.BLUE.index);  
                            richString.applyFont(font3);  
                            cell.setCellValue(richString);  
                        }  
                    }  
                } catch (SecurityException e) {  
                    e.printStackTrace();  
                } catch (NoSuchMethodException e) {  
                    e.printStackTrace();  
                } catch (IllegalArgumentException e) {  
                    e.printStackTrace();  
                } catch (IllegalAccessException e) {  
                    e.printStackTrace();  
                } catch (InvocationTargetException e) {  
                    e.printStackTrace();  
                } finally {  
                    // 清理资源  
                }  
            }  
  
        }  
        OutputStream out = null;  
  
        try {  
            out = new FileOutputStream(fileName);  
            workbook.write(out);  
        } catch (IOException e) {  
            e.printStackTrace();  
        }finally {  
            if (out != null) {  
                try {  
                    out.close();  
                } catch (IOException e) {  
                    e.printStackTrace();  
                }  
            }  
        }  
  
    }
}